Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.common / src / org / simantics / browsing / ui / common / property / PropertyComparable.java

diff --git a/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/property/PropertyComparable.java b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/property/PropertyComparable.java
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+++ b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/property/PropertyComparable.java
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+/*******************************************************************************\r
+ * Copyright (c) 2007, 2011 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.common.property;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public interface PropertyComparable {\r
+\r
+    /**\r
+     * @return a hash code calculated from the data parts that identify the\r
+     *         subject and the property, not the value of the property\r
+     */\r
+    int propertyHashCode();\r
+\r
+    /**\r
+     * Tells whether this property represents the exact same property of the\r
+     * same subject, regardless of the value of the property.\r
+     * \r
+     * @param o another object (property)\r
+     * @return <code>true</code> if both represent the same property of the same\r
+     *         subject\r
+     */\r
+    boolean propertyEquals(Object o);\r
+\r
+}
\ No newline at end of file